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Please use this identifier to cite or link to this item: http://acervodigital.unesp.br/handle/11449/40949
Title: 
Morphological, mechanical properties and biodegradability of biocomposite thermoplastic starch and polycaprolactone reinforced with sisal fibers
Author(s): 
Institution: 
  • Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA)
  • ARS
  • Universidade Estadual Paulista (UNESP)
ISSN: 
0731-6844
Sponsorship: 
  • Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
  • Financiadora de Estudos e Projetos (FINEP)
  • Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
  • Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Sponsorship Process Number: 
FAPESP: 08/08264-9
Abstract: 
The incorporation of fibers as reinforcements in polymer composites has increased due to their renewability, low cost and biodegradability. In this study, sisal fibers were added to a polymer matrix of thermoplastic starch and polycaprolactone, both biodegradable polymers. Sisal fibers (5% and 10%) were extruded in a twin-screw extruder with thermoplastic starch/polycaprolactone (80:20 wt). Films were produced with a single extruder and analyzed by field emission gun scanning electron microscopy, mechanical tests, thermogravimetric analysis and differential scanning calorimetry. The morphology of the composites with 10% sisal fiber content presented an interface of fibers at the surface of the matrix, indicating poor adhesion, lower initial temperatures of thermal degradation, and decreased polycaprolactone crystallinity due to the decrease in lamellar thickness and the increase in crystalline disorder. The results were affected mainly by the lack of adhesion at the interface between the matrix and fibers. The interfacial shear strength between sisal and the matrix may be improved by chemical modification of the fiber surface.
Issue Date: 
1-Apr-2012
Citation: 
Journal of Reinforced Plastics and Composites. London: Sage Publications Ltd, v. 31, n. 8, p. 573-581, 2012.
Time Duration: 
573-581
Publisher: 
Sage Publications Ltd
Keywords: 
  • thermoplastic starch
  • polycaprolactone
  • sisal fiber
  • extrusion
  • biopolymers
  • composites
Source: 
http://dx.doi.org/10.1177/0731684412441092
URI: 
Access Rights: 
Acesso restrito
Type: 
outro
Source:
http://repositorio.unesp.br/handle/11449/40949
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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